RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
217
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10 Commands And Functions
10.1 Overview
The following pages describe the complete RTC
®
5
command set (control commands and list
commands). The commands are listed according to
their intended use. The page numbers refer to
,
where the commands (alphabetically ordered) are
explained in detail.
10.1.1 Nomenclature
Multi-Board Commands
All commands marked (n_) in the following list also
exist in a version for multiple RTC
®
5 boards installed
in one computer. See
for
detailed information about these
multi-board
commands.
Nearly all single-board commands are also available
in multi-board form. Exceptions are explicitly noted in
the description list (in
Normal, Short and Variable List Commands
and List Multi-Commands
The list commands of the RTC
®
5 command set vary
somewhat in their length of command execution. To
differentiate, list commands in the list description (in
) are designated as “normal”, “short”,
“variable” and “multi“.
• Normal list commands require a full 10
µ
s clock
period for command execution.
• Short list commands require less time for
command execution and can therefore be carried
out along with the next list command, one
directly after the other within a single 10
µ
s clock
period, during which control commands cannot
execute. In contrast, a short list command that
immediately follows a normal list command will
execute in the subsequent 10
µ
s clock period.
The quicker execution of short list commands
reduces total list processing time. In addition,
during a polyline, the laser power can, for
instance, be varied or the IO ports can be
addressed (see
) between the
polyline’s individual mark vectors (see
), all without interrupting
polyline traversal (the laser remains on).
In contrast, if a specific time behavior is desired
(10
µ
s clock period), you can insert an additional
short list command to ensure that the next
command only executes in the following 10
µ
s
clock period. Insertion of
(but not
insertion of
) will result in the inter-
ruption of polygonal traversal (the “laser active”
laser control signals are switched off).
Currently, up to 12 short list commands per 10
µ
s
clock period are possible. However, the maximum
number can be lower, depending on the
workload of the RTC
®
5 board and the DSP
version
(1)
. Short list commands that alter the
output pointer (e.g.
or
) count as two commands. If the
maximum number is exceeded, a 10
µ
s clock
period will be inserted (equivalent to an
additionally inserted
polygonal traversal the laser remains on)
.
A maximum of two short list commands per 10 µs
clock period are allowed before a normal list
command. If a normal list command succeeds
more than two short list commands, then the
short list commands will execute immediately and
the normal list command will execute delayed by
a 10 µs clock period.
The maximum number of currently up to 12 short
list commands may change in the future. For fully
future-safe applications, only one short list
command should precede a normal list
command. If necessary, you should explicitly
insert a
(
will
interrupt polygonal traversal).
• The command execution lengths of variable list
commands are dependent on additional param-
eters and the user application. Details are
provided in the corresponding command
description.
• About list multi-commands, see
(1) On older RTC
®
5 boards where DSP version < 2
bits #16-23), only up to 8 short list
commands per 10
µ
s clock period are possible. As of
RTC5OUT.out version 517 or lower, a
will be automati-
cally inserted for exceedances of the maximum number (polyg-
onal traversal is interrupted).
